NeoGAF sheds further light on recent hints that a Gray faction may be in the works for Team Fortress 2, Valve's teamplay shooter. They have uncovered a webcomic called Blood Brothers and other hints in what has turned out to be another of Valve's intricate ARGs. This offers pretty strong support for the theories that all this teasing related to a third robotic/cyborg faction for the game. There's an update on Kotaku where a reader explains how the squad from the valvearg.com chat cracked the puzzles they've found so far, and they link to this video collecting a the intricate series of hints about this Valve has issued over the past couple of years.

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